DE2101956C2 - Air classifier for minerals, esp. cement - incorporates drying shaft for coarse fraction - Google Patents
Air classifier for minerals, esp. cement - incorporates drying shaft for coarse fractionInfo
- Publication number
- DE2101956C2 DE2101956C2 DE19712101956 DE2101956A DE2101956C2 DE 2101956 C2 DE2101956 C2 DE 2101956C2 DE 19712101956 DE19712101956 DE 19712101956 DE 2101956 A DE2101956 A DE 2101956A DE 2101956 C2 DE2101956 C2 DE 2101956C2
- Authority
- DE
- Germany
- Prior art keywords
- classifier
- drying
- air
- room
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001035 drying Methods 0.000 title claims abstract description 18
- 239000004568 cement Substances 0.000 title claims abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims description 3
- 239000011707 mineral Substances 0.000 title claims description 3
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 230000003134 recirculating effect Effects 0.000 claims 1
- 238000005192 partition Methods 0.000 abstract 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
- B07B4/025—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall the material being slingered or fled out horizontally before falling, e.g. by dispersing elements
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Crushing And Grinding (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Die Erfindung beirifft einen Umlaufsichter zum Sichten mineralischer Stoffe, insbesondere Zement, mit vertikaler Achse und außenliegendem Lüfter, bei dem das Aufgabegut mittels eines im Sicntcrraura angeordneten Streulellers in den Sichterraum geschleudert wird, aus welchem das Grobgut nach unten ausfällt und aus welchem die Staubluft am oberen Ende des Sichterraumes durch einen oder mehrere Absaugstutzen Feingutabscheidern zugeführt wird, wobei die aus den Abscheidern abgesaugte Sichtluft über den Lüfter dem Sichter wieder zugeführt wird.The invention relates to a rotary sifter for sifting mineral substances, especially cement, with a vertical axis and external fan, in which the Feed material by means of a arranged in the Sicntcrraura Spreader plate is thrown into the classifier room, from which the coarse material falls down and from which the dust air at the upper end of the classifier room through one or more suction nozzles for fine material separators is supplied, with the sifting air extracted from the separators via the fan to the sifter is fed back.
Derartige Umlaufsichter sind bekannt (US-PS 34 83 973) und werden häufig in'den Mahlkreislauf einer Rohrmühle eingeschaltet, wobei die Grieße des Sichters (Grobgut) wieder der Mühle aufgegeben werden.Such circulating classifiers are known (US-PS 34 83 973) and are often in'den a grinding circuit Tube mill switched on, whereby the grit from the classifier (coarse material) is returned to the mill.
Da bekanntlich ein zu hoher Feuchtigkeitsgehalt des Mahlgutes zu einer verminderten Mahlleistung der Mühle führt, besteht die Notwendigkeit, das in den Sichter aufgegebene Gut weitgehend zu trocknen. Trotz der bekannten Einführung von Heißluft in einen in dem Sichter integrierten und unterhalb des Sichterraumes angeordneten Trockenraum (CH-PS 4 75 039) gelang dies bisher nur unvollkommen, da — bedingt durch die niedrige Bauhöhe des Sichters — die Verwciizeit des Gutes im Sichter zu kurz ist, um eine gute Abtrocknung zu gewährleisten.As is well known, too high a moisture content of the ground material leads to a reduced grinding performance of the Mill leads, there is a need to largely dry the material fed into the sifter. Despite the known introduction of hot air in one integrated in the classifier and below the classifier room arranged drying room (CH-PS 4 75 039), this has so far only succeeded incompletely, because - due to the Low overall height of the sifter - the time the goods are kept in the sifter is too short for good drying to ensure.
Die Erfindung hat sich die Aufgabe gestellt, die Trocknung des Gutes, insbesondere des Grobgutes im Sichter wesentlich zu verbessern.The invention has the task of drying the material, in particular the coarse material in the Significantly improve the classifier.
Diese Aufgabe wird durch die kennzeichnenden eo Merkmale des Patentanspruchs gelöst.This object is achieved by the characterizing features of the patent claim.
Dabei kann durch die waagerechte Zwischenplatte mittels von außen zu bedienender Schieber die Menge und die Temperatur der Trocknungsluft im Trockenschacht gesteuert werden. Durch die vorgesehene An-Ordnung des Trockenraumes unterhalb des Sichterraumes wird das aus dem Sichter ausfallende Grobgut so intensiv abgetrocknet, daß die Mühle, in die das Grob-The amount can be adjusted through the horizontal intermediate plate by means of a slide that can be operated from the outside and the temperature of the drying air in the drying shaft can be controlled. By the intended arrangement of the drying room below the classifier room, the coarse material falling out of the classifier becomes like this thoroughly dried so that the mill into which the coarse
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712101956 DE2101956C2 (en) | 1971-01-16 | 1971-01-16 | Air classifier for minerals, esp. cement - incorporates drying shaft for coarse fraction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712101956 DE2101956C2 (en) | 1971-01-16 | 1971-01-16 | Air classifier for minerals, esp. cement - incorporates drying shaft for coarse fraction |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2101956A1 DE2101956A1 (en) | 1972-07-20 |
DE2101956C2 true DE2101956C2 (en) | 1984-06-07 |
Family
ID=5796061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712101956 Expired DE2101956C2 (en) | 1971-01-16 | 1971-01-16 | Air classifier for minerals, esp. cement - incorporates drying shaft for coarse fraction |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2101956C2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1240374B (en) * | 1966-03-03 | 1967-05-11 | Westfalia Dinnendahl Groeppel | Circulating air separator |
CH475039A (en) * | 1969-01-30 | 1969-07-15 | Polysius Ag | Circulating air separator with hot air drying |
-
1971
- 1971-01-16 DE DE19712101956 patent/DE2101956C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2101956A1 (en) | 1972-07-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OD | Request for examination | ||
8131 | Rejection | ||
8180 | Miscellaneous part 1 |
Free format text: WIEDEREINSETZUNG IN DEN VORHERGEHENDEN STAND |
|
8125 | Change of the main classification |
Ipc: B07B 11/02 |
|
8181 | Inventor (new situation) |
Free format text: JAEGER, HEINZ, 4630 BOCHUM, DE |
|
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8330 | Complete disclaimer |